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Li+ 离子掺杂对红色发光材料Y2 (W,Mo)O6 ∶ Eu3+ 发光性能的影响
Photoluminescence Properties of Y2(W,Mo)O6 ∶ Eu3+ Incorporated with Li+ Ions
- 发光学报 2011年32卷第5期 页码：451-455
- 作者机构：
延边大学理学院 物理系, 吉林 延吉,133002
- 作者简介：
- 基金信息：
DOI：10.3788/fgxb20113205.0451
中图分类号： O482.31收稿日期：2010-12-13，
修回日期：2011-02-24，
网络出版日期：2011-05-22，
纸质出版日期：2011-05-22
- 稿件说明：
移动端阅览
金海杰, 田莲花. Li<sup>+</sup> 离子掺杂对红色发光材料Y<sub>2</sub> (W,Mo)O<sub>6</sub> ∶ Eu<sup>3+</sup> 发光性能的影响[J]. 发光学报, 2011,32(5): 451-455
JIN Hai-jie, TIAN Lian-hua. Photoluminescence Properties of Y<sub>2</sub>(W,Mo)O<sub>6</sub> ∶ Eu<sup>3+</sup> Incorporated with Li<sup>+</sup> Ions[J]. Chinese Journal of Luminescence, 2011,32(5): 451-455
金海杰, 田莲花. Li<sup>+</sup> 离子掺杂对红色发光材料Y<sub>2</sub> (W,Mo)O<sub>6</sub> ∶ Eu<sup>3+</sup> 发光性能的影响[J]. 发光学报, 2011,32(5): 451-455 DOI： 10.3788/fgxb20113205.0451.
JIN Hai-jie, TIAN Lian-hua. Photoluminescence Properties of Y<sub>2</sub>(W,Mo)O<sub>6</sub> ∶ Eu<sup>3+</sup> Incorporated with Li<sup>+</sup> Ions[J]. Chinese Journal of Luminescence, 2011,32(5): 451-455 DOI： 10.3788/fgxb20113205.0451.
摘要
采用高温固相法制备了荧光粉Y
2-
x
(W
Mo)O
6
∶ Eu
3+
x
Li
+
利用X射线衍射仪和电子扫描显微镜对样品的结构和形貌进行了表征
并利用荧光光谱法分析了样品的光谱特性。首先在Y
2
WO
6
中掺入少量的Mo
6+
离子
掺入Mo
6+
后增加了原Y
2
WO
6
∶ Eu
3+
的激发光谱在近紫外光区的吸收
扩展了激发光谱的谱宽
但却使Y
2
WO
6
∶ Eu
3+
发光强度降低。为解决这一问题
在Y
2
W
0.96
Mo
0.04
O
6
∶ Eu
3+
中掺入Li
+
离子
Li起到助熔剂和润滑剂的作用
有效提高了Y
2
W
0.96
Mo
0.04
O
6
∶ Eu
3+
的发光强度。
Abstract
The photoluminescence properties of Y
2-x
(W
Mo)O
6
∶ Eu
3+
x
Li
+
were investigated in this paper. The excitation spectra of Y
2
(W
Mo)O
6
∶ Eu
3+
showed two broad excitation bands at 290 and 368 nm which were attributable to the O
2-
W
6+
and O
2-
Mo
6+
transitions
respectively. The excitation band edge moved from 370 nm to 450 nm with the incorporation of Mo
6+
ions. The emission spectra exhibited two weak lines at 588
593 nm owing to the
5
D
0
7
F
1
transition
and strong sharp peak at about 610 nm owing to the
5
D
0
7
F
2
transition of the Eu
3+
ion. Moreover
the bluish-green luminescence of the WO
6-
6
group corresponding to the
3
T
1u
1
A
1u
transition was also observed in these compounds. The emission of the WO
6-
6
decreases with the increasing concentration of Mo
6+
in Y
2
(W
Mo)O
6
∶ Eu
3+
due to the energy transfer with the process WO
6-
6
MoO
6-
6
. As a result
pure red color emission was obtained with the incorporation of Mo
6+
ions. However
the emission intensities of Y
2
(W
Mo)O
6
∶ Eu
3+
decreased with incorporation of Mo
6+
ions. In order to enhance the emission intensities of Y
2
(W
Mo)O
6
∶ Eu
3+
Li
+
ions were introduced into Y
2
(W
Mo)O
6
∶ Eu
3+
. The red luminescence of Eu
3+
in Y
2
(W
Mo)O
6
was greatly enhanced after codoping monovalent alkali metal ions Li
+
into the lattice. The morphology of powder particles was characterized by scanning electron microscope. The incorporation of Li
+
increased the particle grain size. The hexagonal crystalline of the Y
2
(W
Mo)O
6
∶ Eu
3+
Li
+
powder had a preferred growth orientation. It was speculated that the Li
+
ions may serve as a selfpromoter for better crystallization or as a lubricant for the complete incorporation of the Eu
3+
ions into the host lattice
and it resulted to the enhancemednt of PL of Y
2
(W
Mo)O
3
∶ Eu
3+
.This study showed that the red phosphor
Y
2
(W
Mo)O
6
∶ Eu
3+
incorporated with Li
+
ions was advantageous for LEDs application.
关键词
Keywords
references
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